Double-door lock.



F, LAHR. DOUBLE DOOR LOCK. APPLIUATION FILED Dno.1o,19os.

Patented' Jan@ 25, 1910.

3 SHEETS-SHEET l.

F. LAHR.

DOUBLE DOOBl LOGK. APrLIoATIoN FILED DBo.1o,19os.

'Patented M1125, 1910.

3 SHEETS-SHEET 2.

F LAHR DOUBLE Do LOCK.

APPLICATION FILED DEO. 10,1908.

Patented m1251910.

a MEETS-SHEET a.

' sanear..-

sTATns 'PATNT oFFIoE.

FRANK LAHJR., OF WADSWOR-TH, OHIO.

:DOUBLE-DOOR LUCK.

i Specification of Letters Patent. Patented Jan.. 25, 1910.

Application filed December 10, 1908. Serial No. 468,846. j

To all whomn/t myvconcem:

f. Be it known that I, FRANK LAHR, a citizen of the United States,residing at `Wads worth, in the county of Medina and State of hiO, haveinvented certain new and useful Improvements in Double-Door Locks; and ldo declare the following to be a full, clear,

and exact description of theY invention, such j to improvements in lalocking bolt is operated to fasten two doors together and tosimultaneously operate fastening bolts at the upper and lower ends ofone of the doors.

A further ,object is to provide means whereby the bolt operatingmechanism may be locked and unlocked fromthe outside of the door.

invention consists'of-certain novel features of construction,combination'and .arrangement of parts, as will be more fully describedand particularly pointed out inthe appended claims. A Q

lln the accompanying drawings, Figurel i is a side elevation of theinner ,side of a portion of the two doors showing the arrangement of-thelocking bolts on the inner side of one of said doors; Fig. 2 is anenlarged vertical cross sectional view through one of the doors and thelocking mechanism thereon taken on a line with the operating shaft andhandle; Fig. 3 is a horizontal sectional view through the same parts anda portion of theadjacent door; FigQt is a vertical longitudinalsectional view through the casing of the top and bottom bolt operatingmechanism on the inside of one ofthe doors; Fig. 5f

is a vertical longitudinal sectional view Jthrough one of the doors andthe mortise case showing the bolt which locks the doors together and themeans for operating the same; Fig. 6 is a vertical cross sectional View,showing the arrangement of the keyoperated clutch mechanism by means ofwhich lthe bolt operating mechanism is locked and unlocked and connectedwith the handle and showing the clutch mechanism in a locking position;Fig. 7 is a similar view of the same partsv showing the clutch mechanismin position to connect the handle with the bolt operatingmechanism; andFig. 8 is a -vertical sectional View through the lower portion of one ofthe doors, the threshold `and sill and the lower bolt and casing.

. locking bolt 5 for fastening the two doors together and alsocontaining means for operatingsaid bolt. Arranged through the door andthe mortise case is a bolt operatingshaft 6 on which within the mortisecase is Xedly mounted a bolt-operating lever 7 said lever having' acurved or rounded outer end 8 which lis adapted to be engaged with anotch 9 in the bolt 5 as clear y shown in Fig. 5 oi` the drawings. Inthe inner side of the door 1 is arranged a casing 10 in which isrevolubly1 mounted a bolt operating mechanism comprising a hub 12 onwhich is formed opposite radially projecting bolt voperating levers 13,the ends of which are curved or rounded and are adapted to engage theslidably mounted operating bars 14 and 15 arranged in said casing 10.The upper end oi the bar 14 projects through a guide bearing 16 on theupper side of the casing 10 and has detachably connected thereto anoperating rod 17, the outer end of which is detachably connected with annpi per fastening bolt 18 which 1s slidably mounted in a suitable casing19 secured to the inner side of the door adjacent to its npper edge. Thebolt 18 is adapted to be projected into and retracted from a suitablekeeper 2O arranged in the upper cross bar of the door frame.

'The bar 15 projects through a suitable guide bearing 21 on the loweredge of the casing '10 and has detachably connected thereto an operatingrod 22, the lower endl of which is connected to a lower fastening boltQ3 which is slidably mounted in a suitable casing 24 secured to the sideof the door jacent to its lower edge. 'lhe bolt 231s adapted to beoperated to engage a keeper 25 arranged in the threshold and sill ofthedoor-way. lln order that the bolts 18 and 23 may reciprocate freely intheir respective casing and keepers, l preferably provide 1n the outerportions of the casings 19 and 24 fit . hollow body portion in which isadapted to be placed lead in suiiicient quantity to equal- 'ize'ytheweight of the upper and lower bolts v and their connections.

A The hub 12 of the bolt operating mechanism lprojects through theopposite sides. of the casing 10 and on the outer projecting end'ofthe'hub is arranged a disk 28. and connected to said outer end of thehub is an inner operating handle 29, said handle -being preferablysecured to the end of the 'hub by a cap screw 3Q which passes throughthe inner end of the'handle and a screw threaded aperture in the 'outerend of the hub, as clearly shown in Fig. 3 of the drawings. f

On the outer side ofthe door 1 is-arranged a suit-able casing 31, in theinner end of which is screwed a Stationary member of a three memberclutch. mechanism, said clutch member comprising a circular plate'ordisk 32 having on its` inner side an apertured boss 33E which is setinto the outer side of the door, as shown. The disk or plate 32 is provvided on its lower edge with an outwardly pro ecting segmental flange 34which 'exten s approximately one-half way around the lower portion oftheplate, The intermediate member ofthe clutch device comprises a plateor disk 35 having on its'fupper edgeja right-angular outwardlyprojecting segmental flange 36 said flange extending approximatelyone-half way around the-upper portion of the plate-35, as shown. O n theinner side of the plate or disk 35 1s formed a rearwardly projecting hub37 which projects through and has a bearing gaged, the opposite end ofsaid shaft be-l `in the apertured boss 33 of the plate 32. In the hub 37is formed a squared recess wlth which the outer end of the shaft 6 isening engaged with; a squared recess in the inner end of the hub 1 2 ofthe bolt operating levers 13. In the flange 36 of the plate 35 is formeda centrally disposed notch 38 while in the flange 34 of the plate 32 1sformed-a centrally disposed notc'h 39.

. Adapted to be engaged with the plate 35 of the intermediate clutch`member is a disk" 40 of the outer clutch member. The disk 40 isprovided on its inner side with a centering stud .41j which is en agedwith a centrally disposed-recess 42 ormed in the face' of the disk 35 ofthe intermediate clutch member. To the Aouter side of the disk 40 issecured a tubular operating shank 43 preferably by screws'as 40%. -Thisshank4 43 pro- `jects' through and works in a tubular extension 44of thecasing 31. Slidably mounted between guide lugs 45 on the outer face ofthe disk 40 is a lockin bar 46, said bar being of slightly greater engththan the diameter of the disk 40, whereby one end or the other of thebar projects beyond the edge of `the disk 40 and engages either thenotch 38 in the flange 36 of the intermediate Vclutch member or thenotch 39 in the flange 34 of the stationaryclutch member. When thelocking bolt 46 is engaged with the notch 39 of the stationary member ofthe clutch, the outerr clutch member is` locked' against rotation. Whenthe opposite end ofthe bar 46 is engaged with the notch 38 in th fiange36 of the intermediate member of the clutchmechanism, the movable partsof the clutch and the shaft 6 may be rotated a distance correspondingwith the space between the ends of the flanges`34 and 36. By thismovement of the clutch 'members and the operating shaft 6, the boltoperating levers 'on said shaft are actuated to simultaneously projector retract the bolts of the door.

In the end of the extension`43 of the outer clutch member is arrangedthe outside door handle 48, said handle being operatively connected to4the extension 43`.by a capbolt` 49 which has a screw threadedengagement Vwith the tubular extension, as shown.

The locking bolt 46. is reciprocated between the pairs of guide lugs 45on the diskl v4'() bymeansof a key actuated operating mechanism,comprising a cylindrical plu 50 which is mounted to turn in a cylindricacasing lforming a part of lthe casing 31 onr the outerside of the' door.The plug 50 is provided on its inner end with an eccentrcal-lyarrangedcrank pin 52 to which is connected the lower end `of a 'pitmanrod 53, the upper end of which is connected to a stud 54 projectingfroni the outer side of .the 'bolt' 46 adjacent to its upper end asclearly shown in Figs. 6 and 7 of the drawings.

Thev plug 50 is provided witha series ofI oppsitely disposed lockingpins55-which are in sockets 56 formed in the opposite sides of the plug, asshown. The lower endsof the sockets 56 communicate with, a keyway 57formed in the plug whereby'when. a `key is rinserted into said key-way,the edges' of the key will engage the lower ends ofthe pins *55and'project the latter outwardly so that their outer ends will be flushwith the'` i.'

outer surface of the plug. In the upper side of the casing 51 isarrangedaseries of locking pins 58 which are slidably mounted inpassages provided therefor in the casing and are adapted to drop intothe outer ends of the sockets 56 when the key is removed from lthe plugthereby locking the plug against rotation in the casing. By thisconturned by the key. The, plug is provided on its inner side with asegmental rib 59 or other suitable ball'lingvprojection which is adaptedto be engaged by a suitable recess 60iformed in the key whereby none butthe proper key can be engaged with the plug to operate the same.

In the operation of the lock, when the plug is in position wherein thelocking bar 46 is in engagementwith the notch in the flange ofthe'stationary clutch member, the outer portion of the clutch connectionbe tween the outside door handle and the operating shaft is locked andcannotbe operated .bythe outside handle.

'lhe shaft, however, may be `operated at any timeby the inside doorhandle which connects with the shaft.

through the hub of the bolt operating le-` vers 13. .In order 'to enablethe operating shaft to be turned by the handle on the out side of thedoor, it is necessary to apply the key to the plug to turn the latterinto the position to retract the bolt 46 from the locking notch 39 inthe flange of the stationary clutch member to which the handle isconnected with 'the intermediate member and' through said intermediatemember with the operating'shaft thus enabling -said'shaft to be turnedby the outer handle to operate the bolt actuating levers on the sha-ftand thereby retract or project the bolts to lock or unylock the door.

i From the foregoing description taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood with* out requiring a more extendedexplanation. Various changes 1n the form, proportion and the minordetails of construction may be resorted to without departing from the yI claim asnew and desire to secure by Letyters-Patent is: i

l. In a double door lock, a series of lockl eratively connected to saidshaft, an outerclutch member operatively connected to said handle, andmeans for effecting a locking engagement between said outer andintermediate clutch members. Y 4

2. In a double door lock, a series of locking bolts, an operating shaft,bolt operating levers arranged on said shaft, an inner door handleoperatively connected to said shaft, an outer door handle, a clutchconnection between said outer door handle and the outer end of saidshaft-,said clutch connec tion comprising an inner stationary clutchmember, an intermediate clutch member operatively connected to saidshaft, an` outer clutch member operatively connected to said handle, alocking mechanism between said outer and intermediate clutch members,and key-actuated means for operating said locking mechanism. t

3. In a double doei' lock, a series of fastening bolts, a bolt'actuating mechanism, an inner door handle operatively connected thereto,an outer door handle, a clutch connection between said outer door handleand said operating mechanism, said clutch connection comprising an innerstationary clutch member, an intermediate movable clutch memberoperatively connected with said bolt operating mechanism` an outerclutch member operatively connected with Said outer handle, a lockingbolt carried by said outer clutch member, a key plug, means whereby saidplug is connected with said bolt to reciprocate the latter and therebylock said outer clutch member into engagement with the intermediateclutch member. and means whereby said key plug is locked againstoperation.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FRANK LAHR VVitnesses:

ERWIN L. METTING, S. IIL IIocKE-NSMI'rH.

